DJVU PDF THERAPHAN L. Thongkum. 1980. The distribution of the sounds of Bruu. MKS 8:221-293.
DJVU PDF THERAPHAN L. Thongkum. 1989. An acoustic study of the register complex in Kui (Suai). MKS 15:1-20.
DJVU PDF THERAPHAN L-Thongkum. 1990. The interaction between pitch and phonation type in Mon: phonetic implications for a theory of tonogenesis. MKS 16-17:11-24.
DJVU PDF THERAPHAN L-Thongkum. 1992. A preliminary reconstruction of Proto-Lakkja (Cha Shan Yao). MKS 20:57-90.
DJVU PDF THERAPHAN L-Thongkum. 1993. A View on Proto-Mjuenic (Yao). MKS 22:163-230.
DJVU PDF THERAPHAN L-Thongkum. 1997. The place of Lawi Harak and Tariang within Bahnaric. MKS 27:109-117.